Support TOTP with HMAC-SHA256 and HMAC-SHA512.
Ignore more.
Merge branch 'master' of git://git.sv.gnu.org/oath-toolkit into ocra

Conflicts:
	.gitignore
	NEWS
	liboath/Makefile.am
	liboath/liboath.map
	liboath/oath.h.in
	oathtool/oathtool.c
	oathtool/oathtool.ggo